Commit-ID: 55f77128e7652e537d6c226d5b56821cdb5c22de Gitweb: http://git.kernel.org/tip/55f77128e7652e537d6c226d5b56821cdb5c22de Author: Tommi Rantala <tommi.t.rant...@nokia.com> AuthorDate: Wed, 22 Mar 2017 15:06:24 +0200 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Mon, 27 Mar 2017 15:37:54 -0300
perf utils: Readlink /proc/self/exe to find the perf binary Simplification: it is easier to open /proc/self/exe than /proc/$pid/exe. Signed-off-by: Tommi Rantala <tommi.t.rant...@nokia.com> Cc: Alexander Shishkin <alexander.shish...@linux.intel.com> Cc: Peter Zijlstra <pet...@infradead.org> Link: http://lkml.kernel.org/r/20170322130624.21881-7-tommi.t.rant...@nokia.com Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/util/header.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index cf22962..ef09f26 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -370,15 +370,11 @@ static int write_cmdline(int fd, struct perf_header *h __maybe_unused, struct perf_evlist *evlist __maybe_unused) { char buf[MAXPATHLEN]; - char proc[32]; u32 n; int i, ret; - /* - * actual atual path to perf binary - */ - sprintf(proc, "/proc/%d/exe", getpid()); - ret = readlink(proc, buf, sizeof(buf) - 1); + /* actual path to perf binary */ + ret = readlink("/proc/self/exe", buf, sizeof(buf) - 1); if (ret <= 0) return -1;
